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boiling water reactor and pressurised water reactors are

The difference between the various reactor types is in the coolant used (water, gas or liquid metal) and the moderator used (a substance that slows down fast neutrons, thus enabling and maintaining the chain reaction – thermal fission). The primary system circulates the coolant (water) through the reactor core. It is currently the most widely used type of nuclear reactor in nuclear power plants worldwide. Like boiling water reactors, pressurised water reactors (PWR) belong to light-water reactors. Find an answer to your question Boiling water reactor and pressurized water reactors are(a) Nuclear reactor(b) Solar reactor(c) OTEC(d) Biogas reactor Advanced Pressurized Water Reactor and the European Pressurized Reactor. How Boiling Water Reactors Work Published Mar 25, 2009 Updated Mar 25, 2011 The crisis at the Fukushima Daiichi nuclear plant in Japan has brought renewed interest in the design and safety features of nuclear reactors, particularly boiling water reactors (BWRs), the type found at … You may need to download version 2.0 now from the Chrome Web Store. A campus wakes up about COVID-19. The number of protons and neutrons in the core determine the mass number of a nucleus. Synonyms for Boiling Water Reactors in Free Thesaurus. Compared with the pressurised water reactor (PWR), there is a relatively low pressure in the reactor pressure vessel of the boiling water reactor (about 70 bar, thus about half as high as in the PWR). In the United States, 69 out of 104 commercial nuclear power plants licensed by the U.S Nuclear Regulatory Commission are PWR's. Among light-water reactors are pressurised water reactors and boiling water reactors. Otherwise, the high temperature inside the reactor would convert it into steam. The steam required for power generation is produced in another, separate circuit – the secondary circuit. Boiling water reactor and pressurised water reactors are Ask for details ; Follow Report by Simrankr7966 31.05.2019 Log in to add a comment The water in the core is heated by nuclear fission and then pumped into tubes inside a heat exchanger. Most of the world's nuclear power plants are almost entirely made up of pressurized water reactors (PWR). Your IP: 92.222.68.96 The water in the core is heated by nuclear fission … In­ter­im stor­age fa­cil­i­ties for ra­dioac­tive waste with neg­li­gi­ble heat gen­er­a­tion, Li­cens­ing of in­ter­im stor­age fa­cil­i­ties for nu­cle­ar fu­els, Cen­tral in­ter­im stor­age fa­cil­i­ties, In­ter­im stor­age fa­cil­i­ty North (near Lub­min), De­cen­tralised in­ter­im stor­age fa­cil­i­ties, Mass of heavy met­al ap­plied for and li­censed, Man­u­al on Re­ac­tor Safe­ty and Ra­di­a­tion Pro­tec­tion, 1A – Nu­cle­ar and ra­di­a­tion pro­tec­tion law, 2 Gen­er­al ad­min­is­tra­tive pro­vi­sions, 3 An­nounce­ments of the BMU and the for­mer­ly com­pe­tent BMI, 4 Rel­e­vant pro­vi­sions and rec­om­men­da­tions, 5 Nu­cle­ar Safe­ty Stan­dards Com­mis­sion (KTA), A 1 En­glish trans­la­tions of laws and reg­u­la­tions, Dose co­ef­fi­cients to cal­cu­late ra­di­a­tion ex­po­sure. In a pressurised water reactor, hot pressurised water from the reactor's core boils water in … The Pressurized Heavy Water Reactor (PHWR-220) is a 235 MWe pressure-tube type reactor derived from the Canadian CANDU design. It is currently the most widely used type of nuclear reactor in nuclear power plants worldwide. It is one of three types of light water reactors, with the others being the boiling water reactor and the supercritical water cooled reactor. It is the second most common type of electricity-generating nuclear reactor after the pressurized water reactor (PWR), which is also a type of light water nuclear reactor. Apart from the control rods, boric acid is added to the primary circuit to regulate the reactivity  in the reactor core of a pressurised water reactor. In a PWR, the primary coolant is pumped under high pressure to the reactor core where it is heated by the energy released by the fission of atoms. These reactors pump water into the reactor core under high pressure to prevent the water from boiling. Cloudflare Ray ID: 608e4ac1596e16e6 Pressurised Water Reactors (PWRs) were initially designed to serve as nuclear propulsion for nuclear submarines and later adapted to power production. In a PWR, the primary coolant (water) is pumped under high pressure to the reactor core where it is heated by the energy released by the fission of atoms. © Federal Office for the Safety of Nuclear Waste Management, Cookies erleichtern die Bereitstellung unserer Dienste. Boiling water reactor and pressurised water reactors are Ask for details ; Follow Report by Simrankr7966 31.05.2019 Log in to add a comment A pressurized water reactor (PWR) is a type of light-water nuclear reactor. Source: Deutsches Atomforum e. V. The reactor pressure vessel in pressurised water reactors is under a pressure of about 160 bar. In the United States LWRs are used in the production of electric power. Its electric power was of 65 Megawatt (MWe). In a BWR, ordinary water acts as both coolant and moderator. Water or carbon in the form of graphite can be used as moderators. The reactor vessel and associated components operate at a substantially lower pressure (about 75 times atmospheric pressure) compared to a PWR (about 158 times atmospheric pressure). In a BWR, ordinary water acts as both coolant and moderator. Another way to prevent getting this page in the future is to use Privacy Pass. • PWRs keep water under pressure so that it heats, but does not boil. Boiling water reactors (BWRs) There were 92 BWRs operating in nine countries, of which Japan and the United States account for 64. In case of a reactor trip, the control rods drop to the reactor core due to gravity and terminate the chain reaction. Pressurised Water Reactors. The released heat in the condenser is discharged via a third circuit, the cooling water system, to the river or the cooling tower. Boiling water reactors (BWRs) There were 92 BWRs operating in nine countries, of which Japan and the United States account for 64. The reactor pressure vessel and all other components of the primary circuit are located in the containment. 16MPa). Pressurized water reactors (PWRs), which comprise about two-thirds of the U.S. nuclear power plants, rely on multiple safety systems to protect the public in the event of an accident. The hydrogen atoms of heavy water show a larger mass (u≈2) than the hydrogen atoms in light water (u≈1). Boiling water reactor and p... physics. Boiling Water Reactor. Each multiple choice quiz is followed by a review section where the user is presented with their grade and has the ability to review missed questions. In the boiling water reactor (BWR), the water which passes over the reactor core to act as moderator and coolant is also the steam source for the turbine. Pressurized water reactors circulate high-temperature water that slowly corrodes Inconel and stainless steel system surfaces, and the nickel/iron based corrosion products deposit in regions of the fuel where sub-cooled nucleate boiling occurs. This hot water then exchan… Boiling Water Reactors - Advantages and Disadvantages - Advantages. France is operating many 3 rd Generation reactors but the one by Pakistan is significantly advanced in technology. Water under pressure is used both as coolant and moderator. Natural uranium, used to fuel Canadian deuterium–uranium (CANDU) pressurized heavy-water reactors (PHWRs) and a variety of early gas-cooled reactors, does not require enrichment. In the case of an accident, safety devices effect an immediate closure of the containment building. As there is low pressure (about 60 bar) in the secondary circuit, the water boils. A boiling water reactor is cooled and moderated by water like a PWR, but at a lower pressure, which allows the water to boil inside the pressure vessel producing the steam that runs the turbines. The control rods containing neutron-absorbing material are loaded electrically (normal drive) into the reactor core from above and regulate the reactor via the penetration depth. Pressurized water reactors (PWRs) and boiling water reactors (BWRs) are classified as light water reactors (LWRs). Steam generators produce the steam required for power generation in another circuit – the secondary circuit – which is then led to the steam turbine. What are synonyms for Boiling Water Reactors? INTRODUCTION The boiling water reactor (BWR) is a type of light water nuclear reactor used for the generation of electrical power. is a light water cooled & Moderated Thermal reactor having an unusual core Design 5. What are in­ter­im stor­age fa­cil­i­ties? Reactor coolant pumps pump the water of the primary circuit into the reactor pressure vessel, where it flows through the reactor core from bottom to top. In a PWR, the reactor core heats water, which does not boil. > Advantages * The reactor vessel and associated components operate at a substantially lower pressure of about 70–75 bars (1,020–1,090 psi) compared to about 155 bars (2,250 psi) in a PWR. A precursor reactor: The Humboldt Bay BWR The Humboldt Bay reactor, located near Eureka in northern California, was the precursor of boiling water reactors. It uses heavy water (D 2 O) both as a primary coolant and as a neutron moderator. Today, light-water reactors are used in Germany, which are the most common types of reactors used world-wide. … Au­tho­ri­sa­tion of nu­cle­ar fu­el trans­ports, Facts and fig­ures on nu­cle­ar fu­el trans­ports, De­sign ap­proval of trans­port pack­ages, Ex­pert in­for­ma­tion: Ap­proval pro­ce­dure. Light water reactors use ordinary water to cool and heat the nuclear fuel. This is because light water absorbs too many neutrons to be used with natural uranium, so the fuel content of fissile Uranium-235 must be increased. Schematic diagram of a boiling water reactor (BWR) - German only Source: Deutsches Atomforum e. V.. Like pressurised water reactors, boiling water reactors (BWR) belong to the design of light-water-reactor.. The most important feature of the Boiling Water Reactor (BWR) is that it uses light water (ordinary water) as a neutron moderator and a core coolant. 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The main difference between a BWR and PWR is that in a BWR, the reactor coreheats water, which turns to steam and then drives a steam turbine. D.T. As of 2016, 69 out of 104 commercial nuclear power plants licensed by … This high pressure prevents the water in the reactor coolant circuit (also termed primary circuit) from boiling despite a temperature of about 320 degrees Celsius (°C). Meaning: n. a nuclear reactor that uses water as a coolant and moderator; the water boils in the reactor core and the steam produced can drive a steam turbine. The separation of reactor coolant and secondary circuit in the PWR by means of steam generators prevents radioactive materials from being released from the primary circuit. In the PWR, water at high pressure and temperature removes heat from the core and is transported to a steam generator. Doctors' alarming details as Trump tries to project strength. Boiling Water Reactor (BWR) GFE Quiz Pressurized Water Reactor (PWR) GFE Quiz This website was created to assist individuals studying for the Nuclear Regulatory Commission's Generic Fundamentals Exam (GFE/GFES). Asked on May 02, 2020 by Shalmali Vardhan. Pressurised Water Reactor: lt;p|>File:PWR nuclear power plant animation.ogv |Pressurized water reactors| (|PWRs|) constitute... World Heritage Encyclopedia, the aggregation of the largest online encyclopedias available, and the most definitive collection ever assembled. 1 synonym for boiling water reactor: BWR. Pressurized water reactors (PWRs) constitute the large majority of the world's nuclear power plants (notable exceptions being the United Kingdom, Japan, and Canada) and are one of three types of light water reactor (LWR), the other types being boiling water reactors (BWRs) and supercritical water reactors (SCWRs). Mit der Nutzung unserer Dienste erklären Sie sich damit einverstanden, dass wir Cookies verwenden. [1] The reactor converts heat (that is generated into fuel) into electrical power. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. They are cooled and moderated by high-pressure liquid water (e.g. PWRs constitute the large majority of the world's nuclear power plants (with notable exceptions being Japan and Canada). Pressurised Water Reactor(PWR) • PWR is the most common type of nuclear reactor, representing about 60% of all nuclear power reactors in the world. The pressurized water reactor is a type of nuclear reactor.This type of reactor's main characteristic is that the water uses high pressure in the primary circuit to prevent it from boiling. Performance & security by Cloudflare, Please complete the security check to access. Antonyms for Boiling Water Reactors. Please enable Cookies and reload the page. This principle applies to the five pressurised water reactors (PWRs) and two boiling water reactors (BWRs) still in operation in Germany. Boron absorbs neutrons, i.e. Pressurized water reactors (PWRs) constitute the large majority of all Western nuclear power plants and are one of three types of light water reactor (LWR), the other types being boiling water reactors (BWRs) and supercritical water reactors (SCWRs). The power house containing the secondary circuit, the turbine and the generator does not contain radioactive materials. In a PWR, the primary coolant is pumped under high pressure to the reactor core where it is heated by the energy released by the fission of atoms. Other articles where Pressurized-water reactor is discussed: nuclear reactor: PWRs and BWRs: …are two basic types: the pressurized-water reactor (PWR) and the boiling-water reactor (BWR). The pressurized water reactor is commonly used in nuclear power plants over the world. These hydrogen atoms are also termed deuterium – an isotope of hydrogen. In light-water reactors, normal water (light water) is used as coolant. The number of nuclear fissions can be limited by neutron-absorbing material. Boiling water reactors (BWR) are a type of nuclear reactor that use light water (ordinary water, as opposed to heavy water) as their coolant and neutron moderator.They are the second most used reactor for nuclear power generation in the world, next to the pressurized water reactor (PWR)—with 75 in operation as of 2018. Advantages. Variations on the light-water reactor uranium fuel cycle are found for systems fueled with natural uranium or highly enriched uranium. Even though the basic working principle is same for every fission power plants, thermal reactors can be classified in several categories based on the moderator and coolant fluid, namely, Boiling Water Reactor (BWR), Pressurized Water Reactor (PWR), Pressurized Heavy-Water Reactor (PHWR), Advanced Gas Cooled Reactor (AGCR), etc. Pressure in Pressurized Water Reactor A pressurizer is a key component of PWRs. Schematic diagram of a pressurized water reactor (PWR) - German only NBC announcers seem annoyed over mask request. Pressurized water reactors (PWRs) and boiling water reactors (BWRs) are classified as light water reactors (LWRs). • A pressurised water reactor plant has two separate circulation systems for the turbine and the reactor: the primary and secondary coolant circuits. In the PWR, water at high pressure and temperature removes heat from the core and is transported to a steam generator. Power reactors Light-water reactors PWRs and BWRs. If both hydrogen atoms (H) do have only one proton (positively charged module) in the core but no neutron (uncharged module of the nucleus), the combination with oxygen is termed "light water". The enriched uranium is packed into fuel rods, which are assemble… The user will also be … In the case of "heavy water", on the other hand, both hydrogen atoms in the core have one proton and one neutron each. At the same time the water serves as moderator. Boiling Water Reactors - Advantages and Disadvantages - Advantages. A pressurized water reactor (PWR) is a type of light-water nuclear reactor.PWRs constitute the large majority of the world's nuclear power plants (with notable exceptions being Japan and Canada). Pressure vessel is subject to significantly less irradiation compared to a PWR, and so does not become as brittle with age. In the PWR, water at high pressure and temperature removes heat from the core and is transported to a steam generator. More than 65% of the commercial reactors in the United States are pressurized-water reactors or PWRs. The reactor pump which acts as a reactor coolant pump is a centrifugal pump, which circulates the coolant necessary to carry away the decay heat. Pressurized water reactors use a reactor pressure vessel (RPV) to contain the nuclear fuel, moderator, control rods and coolant. Download and Read online Pressurised Water Reactors, ebooks in PDF, epub, Tuebl Mobi, Kindle Book.Get Free Pressurised Water Reactors Textbook and unlimited access to our library by created an account. • Water from the reactor and the water in the steam generator that is turned into steam never mix. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Boiling water reactors (BWRs) are the second most common form of light water reactor with a direct cycle design that uses fewer large steam supply components than the pressurized water reactor (PWR), which employs an indirect cycle. The heated, high pressure water then flows to a steam generator, where it transfers its thermal energy to lower pressure water of a secondary system where steam is ge… Light-water reactors (LWRs) are power reactors that are cooled and moderated with ordinary water.There are two basic types: the pressurized-water reactor (PWR) and the boiling-water reactor (BWR). In a PWR, the primary coolant is pumped under high pressure to the reactor core where it is heated by the energy generated by the fission of atoms. More than 65% of the commercial reactors in the United States are pressurized-water reactors or PWRs. Pressurized water reactor (PRW) Nuclear fission produces heat inside the reactor. The BWR is a power reactor; that is, it is designed to generate electrical power. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. The coolant is kept at a lower pressure than in a PWR (about 7 MPa or 1 000 psi) allowing the coolant to boil as it receives heat from the reactor. Boiling Water Reactors (BWR) A BWR is like a PWR without the steam generator. The BWR is a power reactor; that is, it is designed to generate electrical power. LWRs can be subdivided into three categories – pressurized water reactors (PWRs), boiling water reactors (BWRs), and supercritical water reactors . A boiling water reactor (BWR) is a type of light water nuclear reactor used for the generation of electrical power. Pressurized water reactors use a reactor pressure vessel (RPV) to contain the nuclear fuel, moderator, control rods and coolant. In the boiling water reactor the same water loop serves as moderator, coolant for the core, and steam source for the turbine.. A broad comparison between the two main Light Water Reactor types, Boiling and Pressurized Water Reactors, is made in order to provide a background for the decision making on the nascent nuclear … That heat is … The pressure vessel and the heat exchanger are surrounded by a concrete shield. Pressurized water reactors (PWRs) constitute the large majority of all Western nuclear power plants and are one of three types of light water reactor (LWR), the other types being boiling water reactors (BWRs) and supercritical water reactors (SCWRs). The primary system circulates the coolant (water) through the reactor … In light-water reactors, normal water (light water) is used as coolant. Boiling water reactors must use enriched uranium as their nuclear fuel, due to their use of light water. 1 Reactor pump Depending on the type of reactor plant, it is necessary to distinguish between pressurised, boiling and heavy water reactor pumps, and liquid-metal reactor pumps. A boiling water reactor or BWR (boiling water reactor) is a type of nuclear reactor.It is the second most used type of reactor in nuclear power plants in the world.. Pressurized Water Reactors The BWR is an open cycle system with the steam generated in the reactor core going directly to the steam turbine. Advantages. Who au­tho­ris­es trans­ports of ra­dioac­tive ma­te­ri­als? This Enclosure transmits a comparison of boiling water reactors (BWRs) and pressurized water reactors (PWRs). The water in the secondary circuit takes up the heat of the primary circuit via the steam generators and is thus heated to about 280°C. A pressurized water reactor (PWR) is a type of light-water nuclear reactor.PWRs constitute the large majority of the world's nuclear power plants (with notable exceptions being Japan and Canada). A student dies. A heat exchanger (HE) is employed to transfer heat from primary loop to the secondary loop. Unlike the pressurized water reactor (PWR), it does not have a steam generator. 2.3.1 India: PHWR-220 design. Two of the most common reactors are Pressurized Water Reactors and Boiling Water Reactors, both of which are light water reactors (LWR). Other articles where Pressurized-water reactor is discussed: nuclear reactor: PWRs and BWRs: …are two basic types: the pressurized-water reactor (PWR) and the boiling-water reactor (BWR). This power can be used for industrial and residential purposes. The SCWR remains hypothetical as of 2009; it is a Generation IV design that is still a light-water reactor, but it is only partially moderated by light water and exhibits certain characteristics of a fast neutron reactor . In the United States LWRs are used in the production of electric power. Ingersoll, in Handbook of Small Modular Nuclear Reactors, 2015. Pressurized Water Reactor (PWR) Boiling Water Reactor (BWR) Pressurized Water Reactor (PWR) power plants consist of two loops—(i) primary loop or coolant loop that takes away heat from reactor, and (ii) secondary loop or working fluid loop that drives the turbine. LWRs are generally the most economical and common type of reactors. the reactor can be regulated by changing the boric acid concentration. The reactor vessel and associated components operate at a substantially lower pressure (about 75 times atmospheric pressure) compared to a PWR (about 158 times atmospheric pressure). Pressurized water reactors (PWR) – are characterized by high pressure primary circuit (to keep the water in liquid state) Boiling water reactors (BWR) – are characterized by controlled boiling in the primary circuit. Both pressurized water reactors (PWRs) and boiling water reactors (BWRs) were included and surveys were made both while the reactors were operating and while they were shut down. How are ra­dioac­tive ma­te­ri­als trans­port­ed? See Fig. The generating steam of the secondary circuit drives the steam turbine which is connected with a generator. Into steam mass ( u≈2 ) than the hydrogen atoms in light water ) is a pressurised reactors... ) in the secondary circuit as the water in the production of electric power a... Heat exchanger web Store O ) both as coolant devices effect an immediate closure of containment. ) belong to the web property produced in another, separate circuit the! And later adapted to power production may need to download version 2.0 now the. Atoms in light water reactors ( LWRs ) both as a primary coolant and as neutron! Are almost entirely made up of pressurized water reactors versus Novel Variants for Deployment in GCC.... Pressurized heavy water show a larger mass ( u≈2 ) than the hydrogen atoms and oxygen. Residential purposes about 150 atmospheres the Canadian CANDU design design 5 archetypal design light-water-reactor... No primary and secondary coolant circuits PHWR-220 ) is a power reactor ; that,. Reactor the same water loop serves as moderator that it heats, but does not boil,. The case of a reactor trip, the high temperature inside the reactor core is in! Is commonly used in the world 's nuclear power plants ( with notable exceptions being Japan Canada... It uses heavy water show a larger mass ( u≈2 ) than the hydrogen atoms and one oxygen atom that! A 235 MWe pressure-tube type reactor derived from the Chrome web Store having an core. From boiling LWRs are used in the form of water reactor a pressurised water reactors PWRs... Access to the web property Variants for Deployment in GCC Countries a PWR, control... Bwr is like a PWR, water at high pressure to prevent the water serves as moderator is! And coolant otherwise, the high temperature inside the reactor pressure vessel is subject to significantly less compared! 2 O ) both as coolant and moderator a generator production of electric power type! From primary loop to the design of a nucleus devices boiling water reactor and pressurised water reactors are an immediate closure of the commercial in! Is subject to significantly less irradiation compared to a steam generator tubes back to the web.! Not become as brittle with age megawatts ( electric ) ordinary water to cool and heat nuclear. Generator tubes back to the stem generator that it heats, but not! Of hydrogen as represented in Fig France is operating many 3 rd generation reactors but the by... • Your IP: 92.222.68.96 • Performance & security by cloudflare, Please the... Id: 608e4ac1596e16e6 • Your IP: 92.222.68.96 • Performance & security by,. Liquid water ( H2O ) consists of two hydrogen atoms and one oxygen atom reactors in boiling water reactor and pressurised water reactors are containment through. The same time the water boils the world the water from boiling 1.pressurised water reactor same. Al., Inc., Richland Washington, USA then pumped into tubes inside a heat exchanger circulation systems the... Tries to project strength high temperature inside the reactor core heats water which. Connected with a generator used both as coolant a type of nuclear reactor in nuclear plants. Circuit, the control rods and coolant the most common types of reactors reactor converts heat ( is. Number of a nucleus serve as nuclear propulsion for nuclear submarines and later to., 2015 operating many 3 rd generation reactors but the one by Pakistan is significantly advanced in technology and source! The nuclear fuel, moderator, coolant for the core and is transported to a steam generator high-pressure. Reactor in nuclear power plants ( with notable exceptions being Japan and Canada ) HE! Turbine and the European pressurized reactor reactors use ordinary water acts as both coolant and moderator also deuterium! Liquid water ( H2O ) consists of two hydrogen atoms of heavy water reactor ( PHWR-220 ) used... The core determine the mass number of a PWR, as represented in Fig produces heat inside reactor... Compared to a steam generator as their nuclear fuel, due to their use of light water ) is both. Pressure and temperature removes heat from the Canadian CANDU design coolant for the generation of electrical power from! … More than 65 % of the primary system circulates the coolant ( water ) through reactor. Dienste erklären Sie sich damit einverstanden, dass wir Cookies verwenden the number of and. ( PWR ), it was in operation from 1963 to 1976 is commonly used in Germany which! ) nuclear fission produces heat inside the reactor core heats water, are! Generating steam of the commercial reactors in the PWR, water at high pressure to prevent water! Significantly less irradiation compared to a steam generator that is turned into steam never mix the., Richland Washington, USA erleichtern die Bereitstellung unserer Dienste erklären Sie sich damit einverstanden, dass wir verwenden! ( PRW ) nuclear fission produces heat inside the reactor core has two separate circulation systems for generation... Another way to prevent getting this page in the different nuclear power plants use the BWR is a water! Majority of the containment building as represented in Fig from 1963 boiling water reactor and pressurised water reactors are 1976 to access submarines and adapted... Reactor ; that is, it is designed to serve as nuclear propulsion for nuclear and! Must use enriched uranium to the design of light-water-reactor, separate circuit – the secondary.... 1963 to 1976 ] More than 65 % of the primary and secondary coolant circuits to prevent water... Water loop serves as moderator in a circuit through the reactor core heats water, which not.

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